Self-filling fountain-pen.



M BORBECK.

SELF FILLING FOUNTAIN PEN. APPLlcAmN meu um. 6. isn.

1,-6,20 Patented June 4,v 1918.

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MARTIN BORBECK, OF SIOUX CITY, IOWA, ASSIGNOR OF ONE-HVALF T HENRY A. MEYER .AND E. A. BUBGESS, BOTH OF SIOUX CITY, IOWA.

SELF-MEIN@ FOUNTAIN-TEN'.

Specification of Letters Patent.

Application led January 6, 1917. Serial No. 141,015.

To all 'whom t may concern:

Be it known that I, MARTIN BoRBEon, a

l citizen of the United States, residing at Sioux City, Woodbury county, State of Iowa, have invented certain new and useful Improvements in Self-Filling Fountain- Pens, of which the following is a specification.

This invention relates to self filling pens and 'articularly to the type having a collapsi le ink receptacle, which, after it is collapsed,lby its expansion is adapted to draw in a supply of ink.

The principal features of the invention reside in the means for collapsing the receptacle and then allowing it to expand and' in the provision of Va yielding means to return the compressorl bar or other means directly actin on the receptacle to its normal position. ther features will be apparent from the description taken in connection with the drawings, in which,

Figure 1 is a perspective view of `a pen, the parts involved in the invention being shown in full lines and the barrel of the pen and other parts being shown in dotted lines;

Fig. 2 is a partial longitudinal section through the pen, with the receptacle in expanded position;

Fig. 3 is a longitudinal sectional view similar to Fig. 2 but showing thereceptacle collapsed; Fig. 4 1s av detail sectional view showing the means for collapsing the receptacle nested in the slot provided therefor in the barrel of the pen;

Fig. 5 is a detail elevational view show ing the pivoted members which are used to collapse the receptacle and particularly illustrating the means for limiting the angle which these members may make with respect to each other.

The invention is shown as embodied in a fountain pen having a. barrel of any desired shape. The usual collapsible receptacle or tube 11 is arr-anged in the interior of the barrel 10 and is adapted to be collapsed by a means which will now be described. A compressor bar 12 is arranged lengthwise of the receptacle 11 between the receptacle and the interior surface of the bore of the barrel. This compressor bar is adapted to be actuated transversely of the bore tocollapse the receptacle into the position shown 1n Fig'. 3. At one end this compressor bar has attached thereto a leaf spring 13 which in normal position, shown in Fig. 2, is in Contact with and parallel with the said bar. At its opposite end this leaf spring 13 is formed with oppositely extending curved arms 14 which are adapted to snugly tit the bore of the barrel and hold this end of the spring bar in contact with the interior surface of the bore and prevent movement of the spring.

Adjacent the .end of the leaf spring having the arms-14, the barrel is formed .with an elongated slot 15 extending through its wall. A member 16 of -a length adapted to fit in the said slot is pivotally mounted at one end as at 17 near the end of the slot. The pivot for this member ma consist of a pin which projects on each si e of the member and is seated in the wallof the barrel. The member 16 at the end opposite its pivoted end 17 has pivotally attached thereto an element 18, the free end 19 of which is adapted to cooperate with the compressor bar 12 to push the same transversely of the bore of the barrel vand compress the receptacle into collapsed position, and for this purpose the spring 13 1s formed with anl elongated slot 20 through which the member 18 may extend. This slot 2 0 is slightly displaced longitudinally away from the pivot 17 so that the end of the member 16 contacts with the spring. This end is formed with a cam surface 21 which is so shaped that its coperation withi'the sprmg member 13 tends to keep it in raised position, such as shown in Figs. 2 and 5, or closed position, such as shown in Fig. 4E. For this purpose it will be noted that the high portion of the cam 21 is arranged withre-- spect to the pivot 17 so that when the mem-y i application of with` respect to the arranged so that the maximum angle which the pivot 17 is' very small as Ithe member 16 is itself small and therefore exerts no great force to move it. While the cam 21 may be provided to keep the member 16 in open or closed position, it is obvious that because the member 16 is of such small weight the friction of the pivot itself or 'other means might be relied upon. The member 18 may be formed with a stop or abutment 22 (Fig. 5) to limit the angle to which it may be move member 16. his stop is may make with respect to the member 16 is less than 90, and is such that when the parts are in the positions shown in Fig. 3 with the receptacle coll-apsed the element 18 makes such an angle 4with respect to the surface of the compressor bar 12 that the friction of the end 19 on said bar is overcome and the element allowed to swing toward the member 16 into the nested and collapsed position of Fig. 4. As clearly shown in Fig, 4 the member 16 and element 18 are adapted to nest in the slot 15 so that the outer surface of the member 16 is iush with the exterior surface of the barrel of the pen. At the end opposite the pivot 17 the slot may be formed with a slight bevel 23 to permit the member 16 to be'easily manipulated to raised position. y l

In the operation of the device, the pen is immersed in a supply of ink and the member 16 raised to the position shown in Fig. 2. As the pen barrel is in more or less of a vertical position the element 18 will open up with respect to the member 16 and assume the position of Fig. 2. The operator then presses the free end of member 16 inward toward the barrel, thus through the element 18, moving the compressor bar 12 to compress the collapsible receptacle into the po sition shown in Fig. 3. With a continued force to the member 16 when the parts have reached substantially the position shown in Fig. 3, the component of force between the end 19 of element 18 and the compressor bar 12 in a direction parallel with the bar 12 will be sufficient to cause the element 18y to swing toward the member 16, these two parts then assuming the position shown in Fig. 4. As the pressure is removed from the compressor bar, the receptacle 11 will expand and draw in a supply of ink.

It will thus be apparent that a verysimple and efficient device is provided for actuating the collapsible receptacle of a self filling fountain pen and that it is only necessary to move the pivoted member 16 inward toward the barrel in order to accomplish both operations of compressing the receptacle and allowing it to expand. Furthermore, the spring 13 returns the bar 12 to its normal position of Fig. 2 and thus relieves the receptacle 11 of this function. Consequently the receptacle may expand to its full size and the element 18 v to expand draw in a larger supply of nk than f'some of theV force of its expansion wereused te' move the operating parts of the pen to their normal positions. Moreover, the leaf spring coperates with the end of the member 16, as previously described, to keep said member in either raised or nested position.

Having thus described the invention, what is claimed and desired to be secured by Letters Patent is:

1. A self filling fountain pen comprising a barrel formed with an aperture in its side walls, a collapsible ink receptacle therein, a compressor bar, an operating member movably mounted on said barrel, and means interposed between said bar and member operative throughsaid aperture and actuated by movement of said member in one direction to cause said compressor bar to successively collapse the receptacle and then allow it to expand.

2. A self filling fountain pen comprising a barrel, a collapsible ink receptacle therein,

an operating member and an element interposed between the member and receptacle and pivoted to the member, said member and element mounted for movement in one direction to successively collapse and release the receptacle and means for automatically rendering said element inoperative a't the end of the receptacle collapsing movement.

3. A self filling fountain pen comprising a barrel, a collapsible ink receptacle therein and means to collapse the receptacle and then allow it to expand including an operating member and an element interposed between the member and receptacle and -pivoted to the member, means to limit the angle to which the element may open with respect to the member to less than 90, said member and element mounted to move in one direction to successively collapse and release the receptacle. w

4. A self lling fountain pen comprising a barrel having a slot through the wall thereof, a collapsible ink receptacle therein, means to collapse the receptacle and then allow it including a member pivotally mounted at pivotally mounted at the opposite end of said member and limited to swing away from the member to an angle of less than 90, said member and element adapted to nest in said slot, and the free end of said element cooperating with said receptacle.

5. A self filling fountain pen comprising a barrel, a collapsible'ink receptacle therein,

saidbarrel formed with a slot, means for collapsing the receptacle comprising a member pivoted lnthe wall of the' barrel and operative through the slot and adapted to nest in said slot when in closed position, said member formed with a cam surface at said pivoted end adapted to yieldingly hold the member 1n open or closed position.

one end of the slot, an element/ Lesmo@ l 6. A self-511mg' fountain eh com ris' ed et the free end of and on the inside of sed a barrel formed with a slot t rough t e w member and stop means to limit the angle thereof, a. collapsible ink receptacle therein, between seid member and element to less 1"@ Ameans for collapsing the vreceptacle includthan`90. 5 ing a member pivotally mounted at one end In testimony whereof I aiiix my signature.

othes'ltfor swinging movement to and from the barrel, an element nivotally mount- MARTIN BORBECK. 

